As pointed out by the linter, some exported functions and types are
missing doc comments.
The linter warnings have been reduced from 194 to 116.
Not all missing comments have been added in this commit though.
Rename "gopkg.in/fsnotify.v1" to "github.com/fsnotify/fsnotify"
per upstream recommendation.
See https://github.com/fsnotify/fsnotify/issues/108 for rationale.
This contains a few fixes (v0.9.1 through v0.9.3) but the same API and few internal changes.
https://github.com/go-fsnotify/fsnotify/blob/master/CHANGELOG.md#v093--2014-12-31
A good first step before switching to v1.
Quite often file watcher gets many changes and each change triggered a
build. One build per second should be sufficient. Also added tracking for
new folders.